How to count items in JSON object using command line?
Just throwing another solution in the mix… Try jq, a lightweight and flexible command-line JSON processor: jq length /tmp/test.json Prints the length of the array of objects.
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How to import a JSON file in ECMAScript 6?
In TypeScript or using Babel, you can import json file in your code. // Babel import * as data from ‘./example.json’; const word = data.name; console.log(word); // output ‘testing’ Reference: https://hackernoon.com/import-json-into-typescript-8d465beded79
Handling JSON Post Request in Go
Please use json.Decoder instead of json.Unmarshal. func test(rw http.ResponseWriter, req *http.Request) { decoder := json.NewDecoder(req.Body) var t test_struct err := decoder.Decode(&t) if err != nil { panic(err) } log.Println(t.Test) }
tsconfig.json: Build:No inputs were found in config file
Add an empty typescript file to the typescript scripts folder (the location of your tsconfig file) to satisfy the typescript compiler.
uncaught syntaxerror unexpected token U JSON
That error is normally seen when the value given to JSON.parse is actually undefined. So, I would check the code that is trying to parse this – most likely you are not parsing the actual string shown here.
is there a require for json in node.js
As of node v0.5.x yes you can require your JSON just as you would require a js file. var someObject = require(‘./somefile.json’) In ES6: import someObject from (‘./somefile.json’)
Display curl output in readable JSON format in Unix shell script
A few solutions to choose from: json_pp: command utility available in Linux systems for JSON decoding/encoding echo ‘{“type”:”Bar”,”id”:”1″,”title”:”Foo”}’ | json_pp -json_opt pretty,canonical { “id” : “1”, “title” : “Foo”, “type” : “Bar” } You may want to keep the -json_opt pretty,canonical argument for predictable ordering. jq: lightweight and flexible command-line JSON processor. It is written … Read more
How do I modify fields inside the new PostgreSQL JSON datatype?
Update: With PostgreSQL 9.5, there are some jsonb manipulation functionality within PostgreSQL itself (but none for json; casts are required to manipulate json values). Merging 2 (or more) JSON objects (or concatenating arrays): SELECT jsonb ‘{“a”:1}’ || jsonb ‘{“b”:2}’, — will yield jsonb ‘{“a”:1,”b”:2}’ jsonb ‘[“a”,1]’ || jsonb ‘[“b”,2]’ — will yield jsonb ‘[“a”,1,”b”,2]’ So, … Read more
Redis strings vs Redis hashes to represent JSON: efficiency?
This article can provide a lot of insight here: http://redis.io/topics/memory-optimization There are many ways to store an array of Objects in Redis (spoiler: I like option 1 for most use cases): Store the entire object as JSON-encoded string in a single key and keep track of all Objects using a set (or list, if more … Read more
Importing JSON file in TypeScript
With TypeScript 2.9.+ you can simply import JSON files with benefits like typesafety and intellisense by doing this: import colorsJson from ‘../colors.json’; // This import style requires “esModuleInterop”, see “side notes” console.log(colorsJson.primaryBright); Make sure to add these settings in the compilerOptions section of your tsconfig.json (documentation): “resolveJsonModule”: true, “esModuleInterop”: true, Side notes: Typescript 2.9.0 has … Read more